Noticing that Chella was no longer calling out to say goodnight anymore, that she was being more secretive, spending more time texting on her phone than with her parents, Rusciano wrote that she took that personally at first, and that she was hurt. So she tried to be more interesting, so she and her daughter could continue to be pals.

The letter continues: "I’ve started to realize that you don’t need a pal. You need a parent. So reluctantly I acknowledge that I must take a huge step back, that I need to give you the space to make mistakes, to get hurt, to learn and to grow."

Then she pays her daughter the compliment that all teens need to hear: "I am completely and utterly proud of the person you are growing into. I just need to let that happen now, and trust in the job that Dad and I have done so far."

She's not abandoning her daughter, though. No matter the sticky situation, her mom will be ready to step in:

"When you have a fight with the girls at school and then one of them goes on a recruitment drive to turn the others against you and then they have a party and don’t invite you. I will be there."

All Chella has to do is ask for her help.

It's brilliant and moving. You can read the whole thing at News.com.au.